KR100297117B1 - How to Convert Fax Data - Google Patents

Abstract

A method of converting facsimile data that analyzes two-dimensional coded facsimile data into one-dimensional facsimile data by reversing an algorithm that performs two-dimensional coding based on a one-dimensional coding method. Determining whether a line of coded data is 1-dimensional coded data or 2-dimensional coded data through, and if it is determined that the two-dimensional coded data is a counter for counting the number of coded data of a line " Initializing to 0 ", analyzing the data bits, counting the number of" 0 "s until the data bit" 1 "is detected, and determining the corresponding mode, and the first changing factor according to the mode determined in the process. 'a1', which is the next change element on the right side of 'a0', and 'a0' and the half, while being the first changing element of the reference line on the right side of 'a0' After determining the distance position between 'bl', which is the color element to be applied, increasing the count and then performing one-dimensional coding.

Description

How to Convert Fax Data

The present invention relates to a method for processing facsimile data in the T.4 protocol, and more particularly, to analyzing two-dimensional coded facsimile data based on a two-dimensional coding algorithm based on a one-dimensional coding method. The present invention relates to a method of converting facsimile data into facsimile data.

In the related art, since a method of inversely converting facsimile data coded in two dimensions according to the T.4 protocol into one dimension has not been proposed, there is a problem that the one-dimensional coded data cannot be adopted and used in a device adopting the two-dimensional method. There is a problem in that mutual compatibility between a transmitting side facsimile using a 1D coding scheme and a facsimile using a 2D coding scheme is not achieved.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and its object is to reduce the transmission time and minimize the generation of errors by inversely converting two-dimensional coded data into one-dimensional reliability and transmission of facsimile data. It is designed to provide speed and to provide convenience to the transmission of facsimile data by using it universally for devices that use one-dimensional coding or devices that use two-dimensional coding.

1 is a flowchart for two-dimensional coding of fax data of the T.4 protocol according to the present invention;

FIG. 2A is a one-dimensional coding table in which data is determined according to the number of colors consecutive in each line.

2B is a make-up coding table in which data is determined according to the number of colors successively arranged in each line.

2C is a makeup coding table in which data is determined according to the number of consecutive black and white continuous lines in each line;

3 is a flowchart for converting two-dimensional fax data of the T.4 protocol into one-dimensional fax data according to the present invention;

4 is a flowchart for performing one-dimensional data coding for each mode.

A feature of the present invention for achieving the above object is, in the facsimile data transmission method, it is determined whether the coded data of a line is one-dimensional coded data or two-dimensional coded data through the data indicating the start of the line Process of doing; If it is determined that the data is two-dimensional coded data, the counter for counting the number of coded data in one line is initialized to "0", and then the data bit is analyzed to determine the "0" until the data bit "1" is detected. Counting the number to determine the mode; According to the mode determined in the above process, "a1", which is the right next change element of the first changing element 'a0', and the first changing element of the reference line at the right of the 'a0', and opposite to 'a0' The method includes determining a distance position between 'b1', which is a color component, and increasing a count, and then executing one-dimensional coding.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

According to the present invention, the data of a line is distinguished from one-dimensional data or two-dimensional data by using the data indicating the start of a line, and then the second two-dimensional data is analyzed based on the one-dimensional data to determine the position of the one-dimensional data. Based on the color, the color type of the 2D data is recognized and converted back into 1D coded data.

The line start data consists of 12 bits called "000000000001", and the value of one bit following it distinguishes whether the next data is one-dimensional or two-dimensional.

In analyzing two-dimensional data, the data is divided into three types by the position of "1" of the data, and it is divided into three types of pass mode, vertical mode, and parallel mode.

By analyzing the two-dimensional data using each of these modes, it is possible to determine what mode the data is. Then, the number and color types of the data to be coded in the first dimension of the two-dimensional data are distinguished using the one-dimensional data.

In the case of one-dimensional data, one color is used to create a one-dimensional data that matches the number. To make one-dimensional data, a make-up code and a termination code are used to create one-dimensional data. ) Use the value of the code.

Hereinafter, a process of converting 1D facsimile data presented by the T.4 protocol into 2D facsimile data will be described in detail with reference to FIG. 1.

When the document is input, it is determined whether the K value is displayed on the first line so as to determine how many lines to code the 2D coding based on the 1D (S101).

If it is determined that the K value displayed in the first line is execution of two-dimensional coding, it is recognized whether the two-dimensional data is one-dimensional data or two-dimensional data from the final line (S102). A color type 'a0', which is a virtual white element, is placed before the first line as a changing element or a reference element (S103), and then, on the right side of the coding element 'a0' and then on the right of the changing elements 'a1' and 'a0'. At the same time as the first changing element of the line, the color element 'b1' opposite to 'a0' and 'b2', which is the next changing element to the right of 'b1' in the reference line, are detected (S104-S106).

Subsequently, it is determined whether 'b2', which is the next changing element on the right of 'b1', is located on the left side of the 'a1', which is changing on the right after 'a0' (S107). In operation S108, 'a0', which is a reference element of the line to be coded, is positioned below 'b2', which is a right-changing element next to 'b1', in the reference line (S109).

If the element 'b2', which changes next to the right of 'b1', is not located on the left of the element 'a1', which changes after the right of 'a0', the absolute value is set by calculating the distance between 'a1' and 'b1'. It is determined whether the reference value 3 or less (S110).

If it is determined that the absolute value of the distance between 'a' and 'b1' exceeds 3, which is a reference value, it detects the element 'a2' that changes next to the right side of 'a1' of the coding line (S111) and then determines that the coding is in vertical mode. In operation S112, the position of 'a0', which is the reference element of the line to be coded, is positioned at the position of 'a1', which is the next changing element after the right of 'a0' of the coding line (S113).

If it is determined that the absolute values of the distances 'a' and 'b1' are less than or equal to 3 as the reference value, it is recognized that the parallel mode is executed (S114) and the position of 'a0' which is the reference element of the line to be coded is determined as 'a1' of the coding line. It is positioned at 'a2' which is the next changing element on the right (S115).

Substituting the data detected according to the position change of the coding line as described above into the T. protocol provided two-dimensional table shown in Table 1 below, it is determined whether or not the final line is detected in the coding progress state (S116). .

TABLE 1

If the last line is not detected, the process returns to S104 and repeatedly executes the above-described process. If the last line is detected, it is determined whether the current page is the last page among all pages transmitted (S117).

If it is not the last page, it is returned and repeatedly executes the operation of detecting the K value in the first line according to the input of a new page. If it is determined that the final page is the last page, the control signal is initialized (S118).

If the K value detected in the first line in S101 is a value requiring 1D coding, the 1D coding operation is executed up to the last page according to the set algorithm (S120 and S121).

An operation of converting the facsimile data converted into two dimensions through one process as described above to one dimension will be described with reference to FIG. 3.

First, it distinguishes whether the input data to be coded is data transformed in one dimension or data converted in two dimensions. In the case of one-dimensional data, the next bit of the EOL indicating the final line is 1, and the two-dimensional data In this case, since the next bit of the EOL indicating the last line is 0, it is determined whether the input data is one-dimensional data or two-dimensional data by distinguishing whether the next bit of the last line is "0" or "1". S210).

If it is determined that the data determined in the above is the two-dimensional coded data, the mode enters a mode to convert the two-dimensional coded data into the one-dimensional data using the one-dimensional coded data as a reference line, and then counts one line of coded data. One counter value is initialized to "0" (S220) and then the number of "0" is counted until the data bit is detected by "1" by analyzing the data bits (S230).

The coding data of one line is composed of one or more elements according to one facsimile paper or a sharper image based on coding data indicating 1728 black and white elements. In either case, any length of data is converted because it is converted to one line.

If the number of "0" is zero in the counting state until the data bit "1" is detected (S231-1), the distance between a1 and b1 in the vertical mode V (0) Means "0".

This means that the one-dimensional coded data 'b1' exists just above the two-dimensional coded data position 'a1', which means that the vertical mode V (0) is converted to the two-dimensional coded data. When the number of data bits "1" is added to the number of data until it is detected, the count value becomes 1 and the data bits are increased by "1" so that the next converted data starts with the data bits after the data bits "1".

When the count 1 in the vertical mode V (0) is increased as described above (S231-3), the previous two-dimensional coded data is converted into one dimension (S240).

In addition, when the number of "0" is 1 in the counting state until the data bit "1" is detected in the above (S232-1), since the vertical mode V1 (1), Vr (1), the next bit Distinguish whether the state of bit is "0" or "1" (S232-2).

When the next bit is "0", the vertical mode V1 (1) means that the spaced distance between "a1" and "b1" is "1" and the position of "a1" is located to the left of "b1". (S232-3, 232-4), when the next bit is "1", the spaced distance between "a1" and "b1" is "1" and the position of "a1" is located to the right of "b1" It is determined that the vertical mode Vr (1) which means there is (S232-5, S232-6).

Accordingly, the count is incremented by three (S232-7) to the number of " 0 " and the data bit " 1 " and the next bit (S232-7) to convert the two-dimensional coded data into one-dimensional data.

When the number of "0" s is two (S233-1) in the state of proceeding counting until the data bit "1" is detected in the above (S233-1) in the parallel mode (S233-2) spaced between 'a1' and 'b1' It means that the distance is below the set value 3.

Therefore, in parallel mode, even when converting one-dimensional data into two-dimensional data, two-dimensional coded data is generated from one-dimensional coded data according to the positions of 'a0' and 'al' and 'a1' and 'a2'. Since this data is two-dimensional data and one-dimensional data, it is used as it is in the conversion to the one-dimensional coded data, and the count is increased by the bit of the one-dimensional coded data (S233-3).

If the number of "0" is 3 in the state that the data bit is counted until the "1" is detected (S234-1), the pass mode (S234-2), the position of 'a1' is 'b1' It means that it is located on the right side of the count is added to the number "3" of "0" and the number "1" of "1" by weighting "4" (S234-3).

When the number of "0" is 4 in the state where the count is progressed until the data bit "1" is detected (S235-1), since the vertical mode V1 (2) and Vr (2), the relative of the next bit Distinguishes whether the bit is "0" or "1" (S235-2).

When the next bit is "0", the vertical mode V1 (2) means that the spaced distance between "a1" and "b1" is "2" and the position of "a1" is located to the left of "b1". (S235-3, 235-4), when the next bit is "1", the spaced distance between "a1" and "b1" is "2" and the position of "a1" is located to the right of "b1" It is determined that the vertical mode Vr (2), which means there is (S235-5, S235-6).

Therefore, the count is increased by 6 to the number of " 0 " and the data bit " 1 " and the next bit (S235-7) to convert the two-dimensional coded data into one-dimensional data.

If the number of "0" is 5 in the state that the data bit is counted until "1" is detected (S236-1), since the vertical mode V1 (3), Vr (3), the state of the next bit Distinguishes whether the bit is "0" or "1" (S236-2).

When the next bit is "0", the vertical mode V1 (3) means that the spaced distance between 'a1' and 'b1' is '3' and the position of 'a1' is located to the left of 'b1'. ) And when the next bit is "1", the spaced distance between "a1" and "b1" is "3" and the position of "a1" is located to the right of "b1". It is determined that it is the vertical mode Vr (3) which means that it is (S236-5, S236-6).

Therefore, the count is increased by 7 to the number of "0" and the data bit "1" and the next bit (S236-7) to convert the two-dimensional coded data into one-dimensional data.

As described above, it is determined whether the RTC (RETURN TO CONTROL) indicating the last line of the page is detected in the state of converting the two-dimensional coded data into the one-dimensional coded data line by line (S250), and indicates the final line. If the RTC is not detected, the process returns to S230 and the above process is repeatedly executed. When the RTC is detected, if the number of one-dimensional data is six, the operation of converting the two-dimensional data into one-dimensional data is terminated.

An operation of converting 2D coded data into 1D coded data according to each mode determined in the above process will be described with reference to FIG. 4.

Since the start of the line determined as the one-dimensional line is always set to 'a0', which is a virtual white color, the mode is determined by detecting 'a0' (S310) and then detecting 'b1' and 'b2' of the reference line, respectively. (S320).

When the determined mode is the vertical mode V (0) (S320-1), the distance between 'a0' and 'b1' is measured and the color of 'b1' is determined to determine the opposite color of 'b1' as shown in FIG. Judging from the table, the data is converted into one-dimensional data (S320-2 and S320-3).

When the determined mode is the vertical mode V1 (1) (S321-1), the distance between 'a0' and 'b1' is measured, and -1 of the measured distance is the length of the data element, and the value of 'b1' The opposite color is determined from the table of FIG. 2 and converted into one-dimensional data (S321-2 and S321-3).

If the mode determined above is the vertical mode Vr (1) (S322-1), the distance between 'a0' and 'b1' is measured, and +1 of the measured distance is the length of the data element. The opposite color is determined from the table of FIG. 2 and converted into one-dimensional data (S322-2 and S322-3).

When the determined mode is the vertical mode V1 (2) (S325-1), the distance between 'a0' and 'b1' is measured, and -2 of the measured distance is the length of the data element, and the value of 'b1' The opposite color is determined from the table of FIG. 2 and converted into one-dimensional data (S325-2 and S325-3).

If the mode determined above is the vertical mode Vr (2) (S326-1), the distance between 'a0' and 'b1' is measured, and +2 is added to the measured distance to become the length of the data element, and The opposite color is determined from the table of FIG. 2 and converted into one-dimensional data (S326-2 and S326-3).

When the determined mode is the vertical mode V1 (3) (S327-1), the distance between 'a0' and 'b1' is measured, and -3 of the measured distance is the length of the data element, and the value of 'b1' The opposite color is determined from the table of FIG. 2 and converted into one-dimensional data (S327-2 and S327-3).

If the mode determined above is the vertical mode Vr (3) (S328-1), the distance between 'a0' and 'b1' is measured, and if the measured distance is +3, the length of the data element becomes 'bl'. The opposite color is determined from the table of FIG. 2 and converted into one-dimensional data (S328-2, S328-3).

In addition, when the mode determined above is the parallel mode (S323-1), data until the next mode is determined is one-dimensional data as it is, and thus one-dimensional coding is performed as it is (S323-2, S323-3).

In addition, when the determined mode is the pass mode (S324-1), the distance between 'a0' and 'b2' becomes the distance between the data elements and the color becomes the opposite color of 'b1'. To 1-dimensional data (S324-2, S324-3).

As described above, the present invention codes the one-dimensional data into the two-dimensional data and the two-dimensional data into the one-dimensional data in executing the facsimile protocol of T.30. It provides compatibility, and the transmission time is shortened by the transmission through the two-dimensional data relatively shorter than the length of the one-dimensional data, thereby minimizing the occurrence of errors, thereby providing reliability in the transmission of the facsimile data.

Claims (8)

(Correction) A facsimile data transmission method comprising: determining whether coded data of a line is one-dimensional coded data or two-dimensional coded data through data indicating the start of a line; If it is determined that the data is two-dimensional coded data, the counter for counting the number of coded data in one line is initialized to "0", and then the data bit is analyzed to determine the "0" until the data bit "1" is detected. Counting the number to determine the mode; According to the mode determined in the above process, 'a1', which is the right next change element of the first changing element 'a0', and the first changing element of the reference line at the right of 'a0', and opposite to 'a0' And determining a distance between the color elements 'b1' and increasing a counter, and then performing one-dimensional coding. 2. The method of claim 1, wherein the classification of the 1D coded data or the 2D coded data is determined by the next bit of the data bit indicating the last line of the page. (Correction) The method of claim 1, wherein when the number of the counted "0" is "0", it is determined that the 'b1' exists immediately above the 'a1' and is in the vertical mode V (0). A facsimile data conversion method characterized by increasing by "1". (Correction) The method of claim 1, wherein when the number of the counted "0" is 1, when the next bit is "0", the spaced distance between "a1" and "b1" is "1" and the value of "a1" It is determined that the position is the vertical mode V1 (1) positioned to the left of 'b1'. If the next bit is '1', the spaced distance between 'a1' and 'b1' is '1' and 'a1' And the count is increased by " 3 ", judging that the position of " " is in the vertical mode Vr (1) located to the right of 'b1'. (Correct) The coding conversion of data according to claim 1, wherein when the number of "0" counted in the above is 2, it is determined that the distance between the 'a1' and the 'b1' is less than or equal to the set value 3 when the number of " 0 " A method of converting facsimile data, characterized in that it is used as it is for conversion to one-dimensional coded data without executing. (Correction) The method according to claim 1, wherein when the number of "0" s counted above is 3, it is determined that the position of 'a1' is located on the right side of 'b1', and the count is increased by "4". A facsimile data conversion method, characterized in that. (Correction) The method of claim 1, wherein when the number of "0" counted above is 4, when the next bit is "0", the spaced distance between "a1" and "b1" is "2" and "a1" is It is determined that the vertical mode V1 (2) located to the left of 'b1'. If the next bit is '1', the spaced distance between 'a1' and 'b1' is '2' and 'a1' is 'b1'. Determining the vertical mode Vr (2) located on the right side of ', and increasing the count by " 6 ". (Correction) The method of claim 1, wherein when the number of "0" s counted above is 5, and the next bit is "0", the spaced distance between "a1" and "b1" is "3" and "a1" is It is determined that the modified mode V1 (3) located to the left of 'b1', and if the next bit is "1", the spaced distance between "a1" and "b1" is "3" and "a1" is "b1". And the count is increased by " 7 " for determining that it is the vertical mode Vr (3) located on the right side of "